The only shocking thing about this episode was that I didn't see D&D dropping the ball so completely. I knew they were going to half-ass the Army of the Dead so they could focus on their pet character (Cersei), I just didn't foresee the entirety of the White Walker threat being this underwhelming. I'd be hard pressed to come up with a more unsatisfying culmination to eight seasons worth of buildup. Why even open the first episode with the White Walkers when their story ends like this?
On top of that, this was one of the least functional large scale battles I've ever watched. It wasn't so much that it was under-lit, but that the quick cuts were so choppy it didn't linger on any shot long enough to see what was happening. The most important thing in a sequence like this with so many characters is geography, so that the viewer understands where everyone is, where they're going and what they're trying to accomplish. None of that was clear or comprehensible. Even Michael Bay crafts more enjoyable and emotionally stirring set pieces. All that money and time the show runners had at their disposal, and somehow it ended up being the worst in the show's history.